Title: 39th Annual Guns and Ammo
1NDIA 39th Annual Guns and Ammunition
Conference Low Cost Solutions for Modern
Munitions EF Cooper Director, RD
2- Q Do new weapons designs require new fuzing /
SAs? - A Yes, but not necessarily cutting edge or
developmental technology - Cost
- Reliability
- Weight dimension
- Environments
3Low Cost Solutions for Modern Munitions
Contents
- M762A1 or M577 Fuzing High Volume Product
Building Block - PGMM
- XM984
- APKWS Block 1
- Self Destruct Fuze
4M762A1/M767A1 ET Fuze
Artillery Electronic Time Fuze
Commanders Award Winner Best TACOM-ARDEC
Producer
Multi-Year Contract (awarded 9/2001) 600,000 base
plus 100 option potential
- Premier electronic-time artillery fuze
- Designed for 105mm and 155mm artillery
- Used with cargo-dispensing, smoke, and
illuminating projectiles - Converts to M767A1 when used with an explosive
booster for HE projectiles - 99 Acceptance 93 Industry
5PGMM
Mechanical SA Solution selected by ARDEC,
Lockheed, ATK and Raytheon
6PGMM
7PGMM
Launch Setback
LCD
Second Environment Sensors
µC
User Interface
M762A1 ASIC
SA
Lead
Existing
Reserve Cell
Lucey Sw/ Dly Ckt
New Parts
Round Interface
Modified
User Interface
8Side View of SA Design
Mechanical SA
Electrical Support Circuitry
9SA Design
Slider (With Shear Nub)
Command Function Lock
Setback Lock
Detonator
10XM984
11XM984 Mortar Extended Range DPICM
Mortar Future Multifunction Electronic Fuze
- M762 fuze technology
- Two-fuze configuration
- Separate timing requirements
12APKWS Block -1
13APKWS Block -1
- 2.75 Rocket with a guidance target detection
module - Needed a mechanical system reacting to launch to
power up systems electronics - Answer an M577 mechanical fuze modification (40
year design) - Withstands TV, drop, etc
- Live firing trials 100
- Low cost materials
- Low cost production methods
14 Low Cost SDF for ICM Rounds
15Pyrotechnic Self Destruct Fuze
Current Contract Requirements
- 20-Year or better storage life
- SDF function time ? 24 sec
- Reliability
- Primary Mode 95
- SDF Mode 95
- Hazardous Duds ? 1/500
16Pyrotechnic Self Destruct Fuze
17Pyrotechnic Self Destruct Fuze
M223E1 SDF Design Features
- Based on M223 Fuze Design
- Arming screw, weight, slider, housing, cover
- Compatible with M42, M46 and M77 Grenades
- SDF functions with or without spin
- SDF is independent of primary mode.
- All energetics are contained in slider
- Stab ignitor, pyro delay, transfer element, M55
detonator - Pyrotechnic delay is a standard mix
(Tungsten/Barium Chromate/Potassium Perchlorate
Composition (MIL-STD-82710)) - Compatible with all existing LAP facilities
18Pyrotechnic Self Destruct Fuze
Description of Applications
19Pyrotechnic Self Destruct Fuze
Value Operational Effectiveness
- TACOM-ARDEC self-destruct timing based upon
statistical analysis of grenade fall times,
various ranges for both M577 and M762 fuzed
projectiles - Criteria established at minimum 24 seconds for
self-destruct to preclude air bursts - TACOM-ARDEC 24 sec criteria ensures
- 100 coverage for M762
- M577 all ranges/all QEs _at_ a reasonable 97.7
- L-3 BTFP design exceeds the TACOM-ARDEC standard
of 24 seconds
20Pyrotechnic Self Destruct Fuze
M864 Projectile Testing, Zone 8
21Pyrotechnic Self Destruct Fuze
Summary
- Today Mechanical/Pyro design exceeds contract
design requirements (lt1) - L-3 BTFP SD Fuze
- Developed in three years IRAD/Govt. funding
- SDF compatible with current U.S. LAP facility
requirements - Loadable Standard components and Technology
- Affordable
- Meets or exceeds 20-year shelf life
- Reliable (100 in last test)
- Pre-Production Engineering is the IPTs next step
22Lessons Learned
- Benefits of designs derived from production
items - reduced development time
- lower production costs
- utility with tandem single warheads
- no high voltage
- batteries not needed in all applications
- precedent cases with safety review boards
- high 1st turn success rates
- Pure electronics are not a panacea
- Pyrotechnic and mechanical technologies provides
reliable sensible solutions